Yumiko Watanabe, Ph.D.

2002 Pennsylvania State University, State College, PA, United States 
Geochemistry, Paleoecology
"Yumiko Watanabe"


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Hiroshi Ohmoto grad student 2002 Penn State
 (The late Archean biosphere: Implications from organic and inorganic geochemistry of shales and paleosols.)
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Watanabe Y, Farquhar J, Ohmoto H. (2009) Anomalous fractionations of sulfur isotopes during thermochemical sulfate reduction. Science (New York, N.Y.). 324: 370-3
Hoashi M, Bevacqua DC, Otake T, et al. (2009) Primary haematite formation in an oxygenated sea 3.46 billion years ago Nature Geoscience. 2: 301-306
Ohmoto H, Runnegar B, Kump LR, et al. (2008) Biosignatures in ancient rocks: a summary of discussions at a field workshop on biosignatures in ancient rocks. Astrobiology. 8: 883-95
Lasaga AC, Otake T, Watanabe Y, et al. (2008) Anomalous fractionation of sulfur isotopes during heterogeneous reactions Earth and Planetary Science Letters. 268: 225-238
Ohmoto H, Watanabe Y, Ikemi H, et al. (2006) Sulphur isotope evidence for an oxic Archaean atmosphere. Nature. 442: 908-11
Ohmoto H, Watanabe Y, Yamaguchi KE, et al. (2006) Chemical and biological evolution of early Earth: Constraints from banded iron formations Memoir of the Geological Society of America. 198: 291-333
Ohmoto H, Watanabe Y, Kumazawa K. (2004) Evidence from massive siderite beds for a CO2-rich atmosphere before approximately 1.8 billion years ago. Nature. 429: 395-9
Ohmoto H, Spangler KR, Watanabe Y, et al. (2004) Smectite dissolution kinetics in high-alkaline conditions Materials Research Society Symposium Proceedings. 807: 723-728
Watanabe Y, Stewart BW, Ohmoto H. (2004) Organic- and carbonate-rich soil formation ∼2.6 billion years ago at Schagen, East Transvaal district, South Africa Geochimica Et Cosmochimica Acta. 68: 2129-2151
Watanabe Y, Martini JE, Ohmoto H. (2000) Geochemical evidence for terrestrial ecosystems 2.6 billion years ago. Nature. 408: 574-8
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